/Engine/Source/Runtime/Core/Public/Internationalization/TextLocalizationResourceVersion.h
Legacy LocRes files will be missing this as it wasn't added until version 1.
static const [FGuid](API\Runtime\Core\Misc\FGuid) LocResMagic = FGuid(0x7574140E, 0xFC034A67, 0x9D90154A, 0x1B7F37C3);